Vendor Management

Overview

Vendor management covers creating and sending purchase orders to suppliers, tracking goods receipts, running vendor performance scorecards (on-time rate, fill rate, defect rate), and maintaining a supplier portal where vendors can acknowledge POs and provide tracking numbers. For most merchants, QuickBooks/Xero handles POs and vendor tracking, while a supplier portal can be as simple as an email-based workflow for smaller operations.

When to Use This Skill

• When managing 5+ suppliers and need a centralized system instead of email-based coordination
• When your merchandising team manually creates purchase orders in spreadsheets and needs automation
• When onboarding new dropship suppliers and need a structured integration flow
• When preparing quarterly business reviews with suppliers and need performance metrics
• When building a multi-vendor marketplace where each seller needs their own dashboard

Core Instructions

Step 1: Determine your platform and choose the right vendor management tool

Store Stage	Recommended Tool	Why
Small (< $1M revenue)	QuickBooks Online or Xero + email-based POs	QuickBooks handles POs, vendor payments, and basic receipt tracking; most small merchants don't need a dedicated vendor portal
Mid-market ($1M–$20M)	DEAR Inventory (now Cin7 Core) or Unleashed	Both handle POs, goods receipts, and vendor scorecards with Shopify/WooCommerce/BigCommerce integrations
Enterprise	NetSuite or Coupa	Full procurement suite with approval workflows, supplier portals, and compliance tracking
Dropshipping focus	DSers, AutoDS, or Spocket	See @dropshipping-integration skill for supplier-specific dropshipping tools
Custom	Build a PO system + supplier portal	For unique workflows that existing tools don't support

Step 2: Connect your e-commerce platform to your vendor management system

Shopify

Using Cin7 Core (formerly DEAR Inventory):

1. Install the Cin7 Core connector from the Shopify App Store or via the Cin7 Core integration settings
2. Cin7 Core syncs Shopify products and inventory — your Shopify stock levels reflect what Cin7 shows as "on hand"
3. Create purchase orders in Cin7 Core → Purchase → Add Purchase
4. When goods are received in Cin7 (mark as Received), Shopify inventory updates automatically

Using QuickBooks Online for POs:

1. Connect QuickBooks to Shopify via the QuickBooks Online app or A2X connector
2. Create POs in QuickBooks Online → Expenses → Purchase Orders
3. When goods are received: in QuickBooks, go to the PO and click "Receive" to record the goods receipt
4. Manually update Shopify inventory after receiving (or use Cin7 Core which does this automatically)

WooCommerce

Using ATUM Inventory Management (PO module):

1. Install ATUM Inventory Management from WordPress.org (premium version for PO features)
2. Go to ATUM → Purchase Orders → Add PO
3. Select supplier, add products, set expected delivery date
4. ATUM emails the PO to the supplier automatically
5. When goods arrive: mark the PO as received in ATUM → WooCommerce inventory updates automatically

Using Cin7 Core:

1. Connect Cin7 Core to WooCommerce via their integration (Cin7 Core → Integrations → WooCommerce)
2. Manage all POs and vendor relationships in Cin7 Core; inventory syncs back to WooCommerce

BigCommerce

Using Unleashed:

1. Install the Unleashed connector from the BigCommerce App Marketplace
2. Create purchase orders in Unleashed → Purchases → New Purchase Order
3. Unleashed syncs inventory back to BigCommerce when POs are received

Using Cin7 Core:

1. Connect via BigCommerce API integration in Cin7 Core settings
2. Same workflow as Shopify/WooCommerce

Step 3: Create and send purchase orders to suppliers

A good PO includes: your PO number, item descriptions with your SKU and the supplier's SKU, quantities, unit costs, expected delivery date, and delivery address.

In QuickBooks Online

1. Go to Expenses → Vendors → [Vendor] → click New Transaction → Purchase Order
2. Fill in: vendor, PO date, expected ship date, items with quantities and unit costs
3. Click Save and Send to email the PO directly to the vendor from QuickBooks
4. Track the PO status in Expenses → Purchase Orders — open POs show as "Open", received as "Closed"

In Cin7 Core / ATUM

1. Navigate to Purchase → New Purchase Order
2. Select the supplier; the system pre-fills the supplier's products from your supplier catalog
3. Adjust quantities based on your reorder quantities (see @demand-forecasting)
4. Set the expected delivery date: your supplier's lead time + today's date
5. Send the PO via the built-in email workflow — the PO PDF is attached to the email

Using a simple email template (for merchants not using a PO system yet)

Subject: Purchase Order PO-202603-001

Dear [Supplier Contact],

Please find our purchase order details below:

PO Number: PO-202603-001
Order Date: March 12, 2026
Expected Delivery: March 26, 2026

Items:
| SKU | Description | Qty | Unit Cost | Total |
|-----|-------------|-----|-----------|-------|
| YS-1001 | Cotton T-Shirt, White, S | 100 | $8.50 | $850.00 |
| YS-1002 | Cotton T-Shirt, White, M | 150 | $8.50 | $1,275.00 |

Total: $2,125.00
Payment Terms: Net 30

Please confirm receipt of this order and your expected ship date.

Ship to:
[Your warehouse address]

Step 4: Set up a supplier portal for PO acknowledgment

For suppliers who work via email, a simple acknowledgment email workflow is sufficient. For higher-volume supplier relationships, a portal improves visibility.

Simple email-based workflow:

1. Send PO via email with a reply-by date (2 business days) asking the supplier to confirm: PO number, items, quantities, and expected ship date
2. When the supplier replies, update the PO status in your system to "Acknowledged"
3. If the supplier can't fulfill the full quantity, get a partial commitment in writing

ATUM Supplier Portal (WooCommerce):

1. ATUM Premium includes a supplier-facing portal where suppliers receive POs, acknowledge them, and enter tracking numbers
2. Go to ATUM → Suppliers → [Supplier] → configure portal access credentials

Cin7 Core Supplier Portal:

1. Cin7 Core includes a supplier portal where vendors can view POs, confirm delivery dates, and upload shipping documents
2. Invite suppliers in Cin7 Core → Settings → Suppliers → Invite to Portal

Step 5: Track goods receipt and update inventory

When a shipment arrives from a supplier:

1. Match the packing list to the purchase order — check every line item's quantity
2. Identify any discrepancies:
   • Short shipment: supplier sent fewer units than ordered → update PO with received qty, leave PO "open" for the balance
   • Damaged goods: record separately; do not put damaged inventory into your sellable stock
   • Wrong items: contact supplier immediately with photos for credit memo

In QuickBooks:

• Open the PO → click "Receive Items" → enter actual received quantities
• QuickBooks creates a bill for the received quantity automatically

In Cin7 Core / ATUM:

• Navigate to the PO → click "Receive Stock" → enter quantities received per line
• Inventory updates automatically in Shopify/WooCommerce/BigCommerce

Step 6: Calculate and review vendor performance scorecards

Run vendor scorecards quarterly to identify underperforming suppliers and support negotiation.

Key metrics:

Metric	Definition	Target
On-time delivery rate	% of POs where actual receipt date ≤ expected delivery date	> 90%
Fill rate	Total units received / total units ordered across all POs	> 95%
Defect rate	Damaged/incorrect units received / total units received	< 2%
Lead time accuracy	Actual lead time vs. quoted lead time	± 2 days

Calculate from your PO system:

In QuickBooks, export PO data to a spreadsheet and compute these metrics. In Cin7 Core and ATUM, built-in vendor reports provide these metrics automatically.

Custom / Headless — vendor scorecard calculation

async function calculateVendorScorecard(params: {
  vendorId: string;
  periodDays: number;
}): Promise<{
  onTimeRatePct: number;
  fillRatePct: number;
  defectRatePct: number;
  overallScore: number;   // 0–100
}> {
  const since = new Date(Date.now() - params.periodDays * 86400000);

  const pos = await db.purchaseOrders.findAll({
    vendor_id: params.vendorId,
    status: { in: ['received', 'partial'] },
    created_at: { gte: since },
  });

  if (pos.length === 0) return { onTimeRatePct: 0, fillRatePct: 0, defectRatePct: 0, overallScore: 0 };

  // On-time: PO received on or before expected delivery date
  const onTimeCount = pos.filter(po => po.received_at && po.received_at <= new Date(`${po.expected_delivery}T23:59:59Z`)).length;

  // Fill rate: total received / total ordered
  const allLines = await db.poLines.findByPoIds(pos.map(p => p.id));
  const totalOrdered = allLines.reduce((s, l) => s + l.quantity_ordered, 0);
  const totalReceived = allLines.reduce((s, l) => s + l.quantity_received, 0);

  // Defect rate: damaged units / total received
  const totalDamaged = await db.damagedReceipts.sumByVendorAndPeriod(params.vendorId, since);

  const onTimeRatePct = (onTimeCount / pos.length) * 100;
  const fillRatePct = totalOrdered > 0 ? (totalReceived / totalOrdered) * 100 : 0;
  const defectRatePct = totalReceived > 0 ? (totalDamaged / totalReceived) * 100 : 0;

  // Weighted score: on-time 40%, fill rate 40%, defect-free 20%
  const overallScore = Math.round(
    (onTimeRatePct * 0.4) + (fillRatePct * 0.4) + ((100 - defectRatePct) * 0.2)
  );

  return { onTimeRatePct, fillRatePct, defectRatePct, overallScore };
}

Best Practices

• Use your accounting software (QuickBooks, Xero) for POs if you're under $1M — it integrates AP and inventory receiving in one tool; you don't need a separate vendor portal at this stage
• Set expected delivery dates conservatively — add the vendor's quoted lead time plus a 2-day buffer; this improves on-time metrics without changing actual performance
• Track partial receipts carefully — many POs arrive in multiple shipments; record the received quantity per line and keep the PO open until fully received
• Record defects at the dock, not later — damaged goods must be logged at receiving time with photos; retrospective claims are harder to substantiate with suppliers
• Share scorecards with suppliers quarterly — suppliers who see their metrics improve; use the data in pricing negotiations ("your fill rate dropped to 88% last quarter")

Common Pitfalls

Problem	Solution
PO total doesn't match the supplier's invoice	Store unit costs at the PO line level and never update them retroactively; price discrepancies become AP exceptions flagged for review
Supplier ships to the wrong address	Include the warehouse address on every PO and in the portal confirmation screen; verify the ship-to address has been acknowledged
Inventory incremented before damaged goods are removed from the count	Only increment inventory for receipts with condition = 'good'; damaged goods go to a quarantine count, not sellable stock
Scorecard shows high on-time rate but stock still runs out	On-time rate measures delivery vs. expected date, not vs. actual demand need date; also track "stockout events attributed to late delivery" as a separate metric

Related Skills

• @dropshipping-integration
• @order-management-system
• @multi-channel-selling
• @demand-forecasting
• @accounts-payable-management